Cedar Mill, OR

Cedar Mill is an unincorporated Washington County community, even though many addresses use Portland as their mailing city. In 2020, the census-designated place had 17,259 residents across 3.33 square miles. It lies north of U.S. 26 and west of Portland, with subdivisions and apartments arranged across rolling ground around Cornell, Barnes, Saltzman, and Murray roads. Shops and services concentrate at the larger intersections, while Cedar Mill Creek, North Johnson Creek, wetlands, and wooded parcels interrupt the street pattern. Washington County handles land-use review and building inspections outside city limits. Water, sewer, fire, parks, schools, and other services come through separate providers or districts, so the mailing line alone does not identify every agency a resident uses.

The community's history begins well before the sawmill that supplied its name. A-tfa-lati people, speakers of a Kalapuyan language, hunted and gathered in this part of the Tualatin Valley and maintained a village near present-day Beaverton. Epidemics and settler occupation devastated their communities; an 1855 treaty removed surviving Kalapuyan people to the Grand Ronde Reservation. Samuel Walters became the first recorded Euro-American settler in Cedar Mill in 1847. In the mid-1850s, the Jones family built a small sawmill beside a 32-foot drop in Cedar Mill Creek near today's Cornell Road and 119th Avenue. A dam, millpond, and overshot waterwheel powered the operation. The mill later closed, but a post office formalized the Cedar Mill name in 1874. Farms and timberland defined the area until postwar housing changed the rural landscape.

Present-day public life follows the creeks and the roads that cross them. The Cedar Mill Creek Greenway carries a paved multiuse trail between Cornell Road, Barnes Road, and Stark Street. It extends for over a mile and passes an overlook near the historic mill site. Roger Tilbury Memorial Park adds paths and nature play along North Johnson Creek. TriMet route 48 follows Cornell and Barnes between Hillsboro and Sunset Transit Center. The county-supported BethanyLink runs between the Portland Community College Rock Creek campus and Sunset, where riders can connect with MAX Blue and Red lines. Local organizing created the community library. Residents founded its nonprofit association in 1974 and opened the first library in 1976; volunteers, fundraising, and an adjoining resale shop still support it. At the old mill site, the falls still show how Cedar Mill acquired its name.

For a prospective homeowner, jurisdiction is the first property question. The county's InterMap tool combines jurisdiction, tax-lot, sales, assessment, and improvement information, and buyers should confirm its answer even when the postal line says Portland. County rules can place a parcel in a 100-year Floodplain, Drainage Hazard Area, or Significant Natural Resource overlay, each with separate development limits. The county also warns that a new owner may be responsible for bringing earlier land-use or building violations into compliance. Permit history, retaining walls, drainage, tree and slope conditions, and any creek-side buffer therefore deserve review before renovation plans are made. The tax bill and service maps identify the responsible agencies more precisely than the mailing city.